“Er,” says Jamie Campbell Bower, his sloth-like limbs coiling around his chair out of discomfort, streaks of blond hair pulled this way and that.

Go on, I coax. あなた can tell GQ. After all, the 24-year-old is now dating his daughter, Lily Collins, who is also his co-star in forthcoming teen blockbuster The Mortal Instruments: City Of Bones, which is how they met.